APPLICATION OF INTEGRATED GEOPHYSICAL AND GEOCHEMICAL PROSPECTING METHODS IN FUXING AREA, JILIN PROVINCE
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摘要:
吉林省延边东部地区是中国东部滨太平洋地区重要的金、铜矿化集中区.九三沟金矿位于集中区内，复兴地区属九三沟金矿外围，成矿地质背景优越.在充分研究地质背景前提下，利用水系沉积物测量进行扫面，圈定Au异常6处，而后开展土壤地球化学测量、大功率激电测深和激电中梯测量工作，圈定了若干有利的成矿远景区，择优开展槽探和钻探工程验证，发现金矿化体2条，取得了较好的找矿效果.说明综合运用物化探方法找矿是可行、有效的，对于区域上寻找同类型矿床具有借鉴意义.
Abstract:The eastern Yanbian area of Jilin Province is an important gold and copper mineralization concentration area in the marginal-Pacific region of eastern China. Fuxing area is in the periphery of the Jiusangou gold deposit, which is located within the mineralization concentration area, with superior metallogenic geological background. Based on a full study of the geological background, the stream sediment survey is conducted for surface exploration and 6 Au anomalies are delineated. Then, through soil geochemical survey, high-power IP sounding and IP intermediate gradient measurement, a number of favorable metallogenic prospects are delineated, among which the superior ones are selected for trenching and drilling verification and 2 gold mineralized bodies are found. Such prospecting results indicate that the application of integrated geophysical and geochemical prospecting methods is feasible and effective, and has reference significance for prospecting similar deposits in the region.
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Key words:
- gold deposit /
- stream sediment /
- geochemistry /
- geophysics /
- element anomaly /
- Jilin Province
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表 1 复兴地区1∶2.5万水系各元素相关性分析一览表
Table 1. Correlation analysis of 1∶25 000 stream sediment survey in Fuxing area
Au Ag As Bi Cu Hg Pb Sb Zn Au 1.000 Ag 0.109 1.000 As 0.205 0.486 1.000 Bi 0.056 0.288 0.201 1.000 Cu 0.119 0.333 0.393 0.216 1.000 Hg 0.029 0.371 -0.008 -0.072 0.230 1.000 Pb 0.077 0.529 0.546 0.495 0.177 -0.163 1.000 Sb 0.102 0.537 0.675 0.253 0.427 0.136 0.642 1.000 Zn 0.105 0.618 0.562 0.204 0.427 0.190 0.695 0.567 1.000 
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表 2 复兴地区1∶1万土壤各元素相关性分析一览表
Table 2. Correlation analysis of elements in 1∶ 10 000 soil survey in Fuxing area
Au Ag As Bi Cu Pb Sb Zn Au 1.000 Ag 0.146 1.000 As 0.069 0.381 1.000 Bi 0.025 0.132 0.342 1.000 Cu 0.059 0.278 0.241 0.123 1.000 Pb 0.060 0.369 0.654 0.316 0.164 1.000 Sb 0.096 0.516 0.656 0.202 0.163 0.612 1.000 Zn 0.053 0.336 0.503 0.226 0.456 0.674 0.427 1.000
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表 3 岩矿石物性参数统计表
Table 3. Physical parameters of rocks and ores
名称 块（点）数 电阻率（ρ）/Ωm 极化率（F）/% 变化范围 几何均值 变化范围 几何均值 石英闪长岩 30 541.7~1354 745.8 1.80~2.80 2.50 安山岩 45 595.0~1454.5 789.5 1.10~2.70 2.10 金矿石 25 215.2~760.3 345.8 2.10~6.20 3.5 角砾岩 30 582.4~1085.3 625.995 1.10~2.70 2.2 石英砂岩 35 589.3~671.5 627.315 2.00~2.30 2.18 花岗斑岩 30 911.6~1086.3 1045.00 2.30~2.80 2.50 花岗闪长岩 40 802.9~870.4 840.00 2.40~2.90 2.60 黄铁矿化石英闪长岩 20 308.8~368.4 339.84 4.30~4.90 4.70
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